Calculator.



A. RECHNHZER. CALCULATOR.

APPLICATION lFILED JULY I7. 1905- RE'NEWED JUNE l319l8.

1,292,51 3. Patented Jan. 28, 1919.

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CALCULATOR.

APPLICATION FILED JULY 17, 1905. RENEWED JUNE I3. 1918.

Patented Jan. 28, 1919.

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APPLICATION FILED JULY I7 |905. HENEWED `JUNI- I3. 1918. l ,292,5 1 3. Patented Jan. 28, 1919.

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CALCULATOR.

APPLICATION FILED .IULY 11,I905. RENEWED JUNE I3, 191B.

1 ,292,5 1 3 Patented Jan. 28, 1919.

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APPLICATION FILED .IULY l 1905- RENEWED JUNE 13, 1918- 51,292,51 3, y Patented Jan. 28, 1919.

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CALCULATOR. APPLICATION FILED IULYII. 1905. RENEWED JUNI-:13. 191B.

Patented Jan. 28, 1919.

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A. RECHNITZER.

CALCULATOR. APPLICATION FILED JULY Il. |905. RENEWED JUNE I3, 1918.

1,292,51 3. Patented Jan. 28, 1919.

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A. RECHNITZER.

CALCULATOR.

APPLICATION FILED JULY 17 1905. RENEWED-IUNE13. 1918.

Patented Jan. 28,1919.

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A. RECHNITZER.

CALCULATOR.

APPLICATION FILED IULY Il, 1905. RENEwED IuNE I3, 1918.

. Patented Jan.28,1919.

I7 SHEETS-SHEET 12.

M MW A. RECHNITZER.

CALCULATOR.

APPLICATION FILED lHILY l?. |905. RENEWED JUNE I3. 1918.

11,292,513. Patented Jan. 28,1919.

I7 SHEETS-SHEET 13.

A. RECHNlTZER.

CALCULATOR.

APPLICATION HLED JULY 17.1905. nENEwED 1uNE13,1918.

1,292,513. I Patented @11.28.1919.

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Patented 3519291919.

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APPLICATION rxLED Ju'LY 17. |905. RENEwD1uNE13,1918.

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CALCULATOR.

APPLICATION FILED JULY I7, 190s. REMI-:wen IuNE Is. IQIB.

LQQ 1 3 I, Patented Jan. 28, 1919 11 SHEETS-SHEET 17- UNITED sTATEs PATENT oEEioE.

ALEXANDER BECHNITZER, OF BERLIN, GERMANY, VASSIG'N'OR T0 AUTABIT-GESELL- SCHAFT M. B. H., 0F VIENNA, AUSTRIA.

CALCULATOR.

Specification of Letters Patent.

Patented Jan. 28, 1919.

Application led July 17, 1905, Serial No. 270,054. Renewed June 13, 1918. Serial No. 239,884.

To all wlw/n it ymuy concern:

Be it known that I, ALEXANDER RECH- .\rr7.En, a subject of the King of Hungary, and resident of No. 1 Bergmann Str., Berlin, Germany. have invented certain new and useful Improvements in Calculators, of which the following is a full, clear, and exac't description.

The object of my present invention is to construct a calculator of the type shown and described in my U. S. Patent #809,075, dated January 2nd, 1906, which can be driven by a motor running'continously during ya calculation. To accomplish my purpose. I have provided new means which make it possible, that the driving motor, may run continuously during the regular course of the calculation, and have provided means which makes it impossible for the machine to come to a standstill in the course of a calculation in any way, for instance if the capacity of the machine should be overreached or Ithrough any other error of manipulations.

In the accompanying drawings,

Figure 1 is a plan view of the machine with a. part of the top plate broken away;

Fig. 2 shows certain safety devices for the lever 25 in a sectional elevation along the line D D of Fig. 1;

Fig. 3 is a detail of an adjusting pin 21;

Fig. 4 is Ka plan view of the machine with the top plates and the carriage removed;

Fig. 5 is a side elevation along the line (1 C Fig. 4;

Fig. 6 is a side elevation along the line B--B Fi 1;

Fig. 7 1s a plan of the mechanism connected with the adjusting lever;

Fig. 8 is a detail of the mechanism connected with the adjusting lever'25;

Fig. 9 is a, sectional detail view showin the connections of the main shaft 13 wit the operating means;

Fig. 10 is a plan view of Fig. 9 and of the worms 29 and 30; y

Fig. 11 and Fig. 12 are, respectively, side and front elevations of the worms and their operating means;

Figs. 13 and 13a are side elevationsvalong the line A-A of Fig. 1; i

. Fig. 14 is a detail plan view 0n line 13-13 Fig. 13

Figs. 15 and 16 are cross sections through the registering and carrying mechanism of the carriage along the line E-E of Fig. 17;

Figs. 17 and 17'1 show a front elevation of the carriage;

Figs. 18 and 18i show a plan view of the carriage with the top plate removed;

Figs. 19 and 20 show .details connected with the steering mechanism;

Fig. 21 shows the electrical motor connections during the actual calculating;

Fig. 22 shows the connections during the return of the carriage- Fig. 23 is a detail View of the connection between axis 13 and axis 44;

Figs. 24 and 25 are front elevations;

Fig. 26'is a side elevation illustrating automatic disconnection of the motor from the machine under certain conditions;

Fig. 27 is a plan view of the mechanism shown in Fig. 2;

Figs. 28 to 30 show details of the mechanism of Fig. 27;

Fig. 31 is a detail in section of the gearing between gears 153 land 154;

Fig. 32 is an enlarged iront elevation of the carrying mechanism as it would appear during the actual performing of a carrying from a lower to a higher digit;

Fig. 33 is a detail drawing of the warning shield;

Fig. 34 is a section through the warning shideld and the mechanism connected with it; an

Fig. 35 is a detail drawing of the yoke and the mechanism connected with, it.

As shown in my hereinbefore mentioned patent, there appear through the top plates of my machine three different rows of devices by which figures can be set up; one row a (Figs. l and 13) is formed by the numeral wheels 320 and the numeral wheels 23, the numerals of which are visible through orifices 24. In this row figures can be caused to appear by turning hand-wheels 6 which extend through the top plate 2 of the carriage and are fastened to the above mentioned numeral wheels. The other row b is formed by the slots 26 in which buttons 27 can be moved to different points along the scale, from 0 to 9. The-third row c is formed by the slots 5 and the buttons 7 sliding in the slots 5. They machine consists of a relatively stationary casin 1 (Fig. 1) and a movable carriage'2. T e slots of row c are in the casing, the slots 26 and the orifices 24 are in the carriage.

An orice is provided'on the left side of the carriage 1 (Figs. 1 and 17) at which, if the machine is in working order, no inscription at all will appear. If the capacity of the machine has been overreached, then a warning shield will appear below the orifice 20, with the inscription either Wrong add or Wrong subtract. If such a shield has appeared 1t shows that the result obtained by the machine is wrong and that the machine is not in normal condition. The machine hasl to be put in normal condition again by the operator, who has to perform either additions or subtractions (according to which warning shield has appeared) un til this warning shield disappears, whereupon further calculation may be done. Means are provided to prevent the machine even then coming to a standstill or being damaged, if the operator does not properly regard the warning shield and continues his calculations without regard to the same.

Means are provided to prevent the turnin of the crank 106 (Figs. 1, 2, 28, 29, 30), uniless the machine is at rest and other means prevent the starting of the machine if the crank'lOG is not at rest. Other means prevent the starting of the machine for a new' calculation, if the result of the previous calculation has not been canceled. Means are provided to prevent the numeral wheels 23 from being turned from 0 to 9 or 9 to 0 by the operator, which would erroneously cause a carrying in the next calculation.

The carriage is returned to its initial position automatically after the completion of each calculation.

The starting lever 25 is returned to its initial position, not only after the completion of an addition and subtraction', as has been done before, but either after a multiplication or after a division. On the other hand, the lever 25 cannot be moved during a multiplication or a division by the operator, which lever is moved automatically, after the completion of theA calculation. The carriage 2 will usually tend to run to its utmost left-hand position during each multiplication and division, but for calculating with smaller figures, the movement of the carriage tothe left may be limited by the operator to certain digits, by inserting the pin 21 (Fig. 3) into one of the holes 22 (Fig. 1).

Operating mechanism.

My preferred operating devices are mounted below and in contact with the buttons 7 of row c, and turn the registering wheels 23 to an extent indicated by the number set up in row c (Figs. 1 and 13).

Rigidly secured to the main shaft 13, by one rotation of which, one addition or one subtraction is performed, is a segment 127 (Figs. 9, 10) which meshes with the gear 128 which is fastened to the shaft 122. The segment 127 has so many teeth that it turns the gear 128 once during each rotation of the main shaft 13, and thus causes the shaft 122 to be turned once. The shaft 122 is provided with a setof bevel gears 14v which are rigidly secured to it and which mesh with bevel gears 123. (Figs. 10 and 13a). These bevel gears 123 are secured to shafts 124, which are rotatably mounted in the` casing 1. yOn this shaft there are drums 3, one provided below each slot 5. Above the drums 3 are mounted a set of shafts 10, on which gears 9 are slidable, but turning with their square shafts 10. Such a gear 9.is slid forward and backward in its slot 5, on its shaft 10 by the button 7 carrying depending arms 125 which extend into the slot o1' groove 8 of the gear 9. On the drum 3 are gear teeth 4 cut in a certain well known manner, so that if the button 7 stands at 1, 2, 3 0r 4, etc., of its scale, then the gear 9 is put to such a position above the drum 3, that 1, 2, 3 or 4, etc., of the drum will come into mesh with the gear 9 as often as the drum 3 is given one full turn. Thus it can be seen that each of the gears 9 will be turned to a certainv extent dependent upon the position of its button 7 in its slot 5. The rotation of the shaft 10 is then transferred to the registering wheels 23 in the following manner if addition is performed. On the shaft 10 is the bevel gear 15 (Figs. 4, 10, 13) which turns a bevel gear 16, Ato which a gear 18 is secured. Gears 16 and 18 are freely rotatable on their shaft 126. The gear 18 transfers its movement to the gear 33 (Fig. 13) hereinafter described which is mounted on the carriage and turns a numeral wheel 23 by way of the gears 34 and 35 (Figs. 16 and 6). All these gears are cut in such a Way that the numeral wheel 23 will be moved 1, 2 or 3, etc. units if the. gear is turned 1, 2 or 3, etc.'teeth. A com venient arrangement, for instance, would be toy provide gear 9 and bevel gear 15 with ten teeth, the bevel gear 16 and gear 18 with fourteen teeth, and have the three gears 33, 34 and 35 all provided with ten teeth- If the figures set up in row c are to be subtracted instead of added, the numeral wheels 320 and23 must be operated in the opposite direction. For this purpose a second bevel gear 17 with=the gear 19 (Figs. 4

and 10) is provided and in mesh at the right side of the bevel gear 15. The bevel gear 17 and gear 19 are therefore turned in an opposite direction to the gearsl 16 and 18. If, therefore, a figure is to be subtracted from the numeral wheels instead of added, tht` carriage must be shifted to such a position that the gears 33 will come in mesh with the gears 19 instead of with the gears 18. Thus` my operating devices operate the registering Upon each rotation of the main shaft 13, one addition er one subtractionA is performed. Certain means must be actuated which perform the transfer of a unit from a lower to a higher digit, provided the lower numeral wheel passes from 9 to 0 or 0 to 9.

The operating devices areA operated during a part of a rotation of the main shaft 13, and after the operating devices have ceased to move the cari-yin mechanism is actuated. It is done in the fo lowing manner: A segment 129, (Figs. 4 and 23) rotates with the main shaft 13 and causes the gear 156 and the shaft 44, with all its gears 52, to turn a certain extent. These gears 52 are mounted on -the shaft 44 in such a way that two of them will come in mesh with the gears 161 and 153 (Figs. 17 and 18) 'on the carriage if the carriage is in an adding position, at which time the gears 33 and 18 will be in mesh, in the position shown in Fig. 1, but if the carriage is in a subtracting position, z. e., when gears 33 mesh with the gears 19, then the gears 160 and 154 will be in mesh with two gears 52. The segments 129 and the gear 156, and the gears 52 and 153, 154, 160 and 161 will be cut in such al manner that, upon each rotation of the main shaft 13, the gears 153 and 161, or the gears 154 and 160, respectively, are turned once. A suitable arrangement would be to have the segment 129 provided with fourteen teeth, the gears 156 and 52 provided each with ten teeth, and the gears 153, 154, 160 and 161 provided with fourteen teeth. The carrying mechanism will be actuated through the driving means to be caused to perform -properly a carrying, according to addition if the gears 161 and 153 are given one full turn, and will be caused to erform a carrying according to subtraction if the gears 154 and 160 are given one full turn.

Secured to the back plate of the carriage (Figs. 15, 16, 17 and 18) are bearings 30a, 30, 30e, etc., on which the carrying mechanism is mounted. The shaft 31 is mounted in these bearings 30 and carries the independently rotatable numeral wheels 23. Rigidly secured to the numeral wheels are the gears 35 which are in mesh Vwith the gears 34 which are riveted to square shafts 60 (Fig. 32) and rotate with them on the shaft 37 so that the gears 34 can be driven by the gears 33 (Fig. 16). The gears 33 rotate freely on shaft 38 (Fig. 16) so that any operating devices as those described can turn the numeral wheel 23 in either direction by way of the gears 33 and 34. While the numeral' wheels 23 are turned by the operating mechanism, the preparation for the carrying of the tens is performed in the following manner:

The wheel 45 with its safety wheel 46 (Figs. 17, 18'L and 32) will be moved out of its (rest) position which is shown between the bearlngs 30b and 30c of Figs. 32 and 17 to the left into itsactive position' as shown between the bearings 30@l and 30d of Fig. 32, and between the bearings 30a and 30h of Fig. 17, by the following means: With each of the numeral wheels 23 there are rotatable single teeth 36 (Figs. 15, 17, 32). Each of these single teeth 36 mesh in the position shown in Fig. 17, with a single tooth 40 which is fastened to a segment 42. VThe segment 42 is secured to a small drum 47 which rotates but does not slide on shaft 37. Milled into the lower surface of this drum is an angle-shaped groove 41. A lever 50 pivoted on bearing 51 has its front end under the drum 47 and has on its right side a pin 53 (Figs. 17, 18a, 32) which extends into the groove of the drum 47 and on its left side another pin or upward bent arm 55 which extends into the groove 5 9 of the gear 45 which rotates with the square shaft 60 on which it can slide. T he shaft 60 rotates freely on shaft 37.

If a registering wheel 23 passes from zero to nine or nine to zero, its single tooth 36 will strike the tooth 40 and turn the groove drum 47 to the one or other side. The movement of the drum 47 will cause the pin 53 of the lever 50 to be pressed out of its normal position, which is in the middle of the groove 41, to the end ofeither one arm or the other of this groove 41, the pin thus being moved to the left in Figs. 17, 18a and 32; therefore the lever 50 and through it the gear 45 is also moved to the left and reaches the position mentioned before as active position,vwhich is shown between bearings 30C and 30d of Fig. 32, 30a and 30C of Fig. 1T and at the left of bearings 30g and 30" in Fig. 18a.

After the operating means have ceased to turn the registering wheels 23. the carrying of the tens which has been prepared as dcscribed. will be done if either the gears 152' and 161 are given a full turn as for addition, or if the gears 154 and 160 are turned for subtraction.

The following mechanisms are thereby actuated:

Each of the gears 153 and 154 have rigidly fastened bevel gears 61 and 62 which are in mesh with a third bevel gear (Si) Figs. 17 and 31) freely rotating on its bearing. The gear 154 with its bevel gear 61 is loosely rotatably mounted so as to be on shaft 120. the gear 153 with its bevel gear 62 is rota- 

